Optical element driving device, camera module, and camera-equipped device
AssigneeMitsumi Electric Co., Ltd.
InventorsShun Suzuki, Tomohiko Osaka
Life of this patent
Estimating the term…
Abstract
This optical element driving device is provided with: a movable part capable of holding an optical element; a driving part that includes an ultrasonic motor and drives the movable part; a voltage boosting part having an inductor that boosts input voltage inputted to the driving part and supplies the boosted input voltage to the ultrasonic motor; a position detection part that detects the position of the movable part; and a substrate part on which the position detection part and the voltage boosting part are disposed.
Claims17
An optical-element driving device configured to be built in a camera-mounted device, the optical-element driving device comprising:
- a movable part including a magnet part and configured to hold an optical element;
- a driving part including an ultrasonic motor and configured to drive the movable part;
- a boosting part including an inductor that boosts an input voltage to be inputted to the driving part and supplies the input voltage to the ultrasonic motor;
- a position detecting part disposed on facing the magnet part and configured to detect a position of the movable part;
- a board part on which the position detecting part and the boosting part are disposed;
- and
- an electrode portion,
- wherein:
- the ultrasonic motor includes a resonant portion and piezoelectric elements,
- the piezoelectric elements are connected to the board part via the electrode portion,
- the movable part is disposed to be movable in a direction of an optical axis,
- the driving part is disposed on one end side of opposite ends of the movable part with respect to the optical axis, and
- the boosting part is disposed on an other end side of the opposite ends with respect to the optical axis.
An optical-element driving device configured to be built in a camera-mounted device, the optical-element driving device comprising:
- a movable part including a magnet part and configured to hold an optical element;
- a driving part including an ultrasonic motor and configured to drive the movable part;
- a boosting part including an inductor that boosts an input voltage to be inputted to the driving part and supplies the input voltage to the ultrasonic motor;
- a position detecting part disposed on facing the magnet part and configured to detect a position of the movable part;
- and
- a board part on which the position detecting part and the boosting part are disposed,
- wherein:
- the movable part is disposed to be movable in a direction of an optical axis,
- the driving part is disposed on one end side of opposite ends of the movable part with respect to the optical axis, and
- the boosting part is disposed on an other end side of the opposite ends with respect to the optical axis.
An optical-element driving device configured to be built in a camera-mounted device, the optical-element driving device comprising:
- a movable part including a magnet part and configured to hold an optical element;
- a driving part including an ultrasonic motor and configured to drive the movable part;
- a boosting part including an inductor that boosts an input voltage to be inputted to the driving part and supplies the input voltage to the ultrasonic motor;
- a position detecting part disposed on facing the magnet part and configured to detect a position of the movable part;
- a board part on which the position detecting part and the boosting part are disposed;
- an electrode portion;
- and
- a storage for storing therein variation data of the inductor,
- wherein:
- the ultrasonic motor includes a resonant portion and piezoelectric elements,
- the piezoelectric elements are connected to the board part via the electrode portion, and
- the driving part drives the movable part based on the variation data.
Dependencies are inferred from the claim text.